概要
客户要求改善 SharePoint 2007的搜索功能,我们要自定义开发搜索功能,一翻调查和研究,sharepoint 的搜索用到KeywordSearchQuery和FullTextSearchQuery 两种方式,因为我们要用到自定义的sharepoint list字段做为过虑条件,所以采用FullTextSearchQuery 来开发。
设计
FullTextSearchQuery 做sharepoint 2007二次开发要用到以下组件:
using Microsoft.Office.Server; using Microsoft.Office.Server.Search; using Microsoft.Office.Server.Search.Query;
在sharepoint 2007中,我们如下scope():
默认的有people和all sites两个scope。我们以All sites举例。
sharepoint Content sources 在爬虫时的流程图(方便理解scope()内容的来源)
以下是查询的流程图:
用户使用查询时,sharepoint对于用户的安全检查:
以上说明仅供读者了解sharepoint查询时要做的工作.
Microsoft.SharePoint.Search.Query 命名空间包括三个查询类:
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FullTextSqlQuery 使用此类可执行 SQL 语法搜索查询。
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KeywordQuery 使用此类可执行关键字语法搜索查询。
为自定义搜索应用程序选择查询类
若要确定用于自定义搜索应用程序(FullTextSqlQuery 或 KeywordQuery)的适当的类,请考虑希望应用程序代码支持的搜索查询中的复杂级别。
下面的列表标识仅受使用 FullTextSqlQuery 类的 SQL 搜索语法支持的附加查询元素:FREETEXT、CONTAINS、LIKE和ORDER BY.
代码设计
public class SharePointSearch { #region Fields string queryStr = @"select hitHighlightedProperties,size,Write, author, path, hitHighlightedSummary,title,contentclass from scope() where " + "\"scope\" = '{0}' AND FREETEXT(defaultproperties, '{1}') "; string conditionSearchSource = " AND CONTAINS(path,'{0}')"; #endregion #region Constructor /// <summary> /// Default constructor. /// </summary> public SharePointSearch() { } #endregion #region Public Methods /// <summary> /// /// </summary> /// <param name="scope"></param> /// <param name="searchSource"></param> /// <param name="keyword"></param> /// <param name="rowLimit"></param> /// <returns></returns> public DataTable GetSearchResultByKeyWord(string scope, string searchSource, string keyword, int rowLimit) { string query = string.Format(this.queryStr, scope, keyword); if (!string.IsNullOrEmpty(searchSource)) query += string.Format(this.conditionSearchSource, searchSource); return this.CustomSearch(query, rowLimit); } /// <summary> /// /// </summary> /// <param name="query"></param> /// <param name="rowLimit"></param> /// <returns></returns> public DataTable GetSearchResultByQuery(string query, int rowLimit) { return this.CustomSearch(query, rowLimit); } #endregion #region Private Methods /// <summary> /// Excute search query /// </summary> /// <param name="query"></param> /// <param name="rowLimit"></param> /// <returns></returns> private DataTable CustomSearch(string query, int rowLimit) { DataTable result = new DataTable(); string url = SPContext.Current.Web.Url; using (SPSite site = new SPSite(url)) { ServerContext context = ServerContext.GetContext(site); FullTextSqlQuery fullQuery = new FullTextSqlQuery(site); fullQuery.Culture = System.Globalization.CultureInfo.InvariantCulture; fullQuery.QueryText = query; fullQuery.ResultTypes = ResultType.RelevantResults; fullQuery.EnableStemming = false; fullQuery.IgnoreAllNoiseQuery = true; fullQuery.TrimDuplicates = true; fullQuery.KeywordInclusion = KeywordInclusion.AnyKeyword; fullQuery.RowLimit = rowLimit; if (SPSecurity.AuthenticationMode != System.Web.Configuration.AuthenticationMode.Windows) fullQuery.AuthenticationType = QueryAuthenticationType.PluggableAuthenticatedQuery; else fullQuery.AuthenticationType = QueryAuthenticationType.NtAuthenticatedQuery; ResultTableCollection rt = fullQuery.Execute(); ResultTable resultTable = rt[ResultType.RelevantResults]; result.Load(resultTable, LoadOption.OverwriteChanges); } return result; } #endregion }
而为什么FullTextSqlQuery 的属性是这样设置的,因为能过moss工具产生的xml结果图如下:
<?xml version="1.0" encoding="utf-8" ?> <QueryPacket xmlns="urn:Microsoft.Search.Query" Revision="1000"> <Query domain="QDomain"> <SupportedFormats><Format>urn:Microsoft.Search.Response.Document.Document</Format></SupportedFormats> <Context> <QueryText language="en-US" type="MSSQLFT"><![CDATA[ SELECT Title, Rank, Size, Description, Write, Path FROM portal..scope() WHERE FREETEXT(DefaultProperties, 'test') AND ( ("SCOPE" = 'All Sites') ) ORDER BY "Rank" DESC ]]></QueryText> </Context> <Range><StartAt>1</StartAt><Count>20</Count></Range> <EnableStemming>false</EnableStemming> <TrimDuplicates>true</TrimDuplicates> <IgnoreAllNoiseQuery>true</IgnoreAllNoiseQuery> <ImplicitAndBehavior>false</ImplicitAndBehavior> <IncludeRelevanceResults>true</IncludeRelevanceResults> <IncludeSpecialTermResults>false</IncludeSpecialTermResults> <IncludeHighConfidenceResults>false</IncludeHighConfidenceResults> </Query></QueryPacket>
如果sharepoint里item内容语言是en-us的话,一定要在IE浏览器里设置:
把english[en]放到最上面。
作者:spring yang
出处:http://www.cnblogs.com/springyangwc/
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